CORSAIR Power Supply - 850w Rme Series Rm850e 24-pin ATX Black

The CORSAIR RM850e 850 W is a fully modular ATX power supply designed for modern desktop PCs. It delivers 850 watts of continuous power, includes a native 12V-2x6 (PCIe 5.1) GPU connector, and is ATX 3.1 certified with Cybenetics Gold efficiency for reliable, energy-efficient operation. The unit has a compact 140 mm length, a 120 mm fan for active cooling, a 24-pin ATX motherboard connector and a black finish that fits most builds.

Advantages

The RM850e combines fully modular cabling for neat builds with native PCIe 5.1 12V-2x6 GPU support, enabling compatibility with current and next‑gen graphics cards. ATX 3.1 certification and 80 PLUS Gold / Cybenetics Gold efficiency provide stable power delivery with up to around 90% efficiency, lower noise and cooler temperatures. A compact 140 mm housing and a 120 mm rifle-bearing fan reduce space requirements and keep acoustic output low. Industrial-grade components, including resonant LLC topology with DC-DC conversion and 105°C rated capacitors, ensure long-term reliability and consistent electrical performance.

Suitable for

• High-performance gaming PCs using modern GPUs
• Workstations requiring stable 850 W power delivery
• Compact ATX cases where shorter PSU length is needed
• Systems that benefit from fully modular cabling for improved airflow and cable management

Key specifications

• Total power: 850 W
• Motherboard connector: 24-pin ATX
• GPU connector: native 12V-2x6 (PCIe 5.1)
• Certification: ATX 3.1, 80 PLUS Gold, Cybenetics Gold
• Fan: 120 mm rifle-bearing
• AC input voltage: 100 - 240 V
• Dimensions: compact 140 mm length (housing)
• Weight: 2.93 kg
• Colour: Black

How to use

Install the RM850e into a compatible ATX case, secure it with the supplied screws and connect the 24-pin ATX motherboard cable, CPU and PCIe cables as required. Use only the modular cables needed for your configuration to minimize clutter and improve airflow. Verify correct seating of the 12V-2x6 GPU connector on supported graphics cards. Connect the unit to mains power within the specified 100–240 V range and power on the system.

Recommendations

For best results, pair the RM850e with modern GPUs that accept the 12V-2x6 (PCIe 5.1) connector and ensure your case accommodates a 140 mm PSU length. Maintain proper ventilation, periodically clean the 120 mm fan and choose only the modular cables required to keep internal airflow optimal.